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1、,整十数加一位数及相应的减法,说说数的组成：,_ 个十，_个一，合起来是_。,5,2,25,_ 个十，_个一，合起来是_。,3,6,63,45里面有( )个十和( )个一,4,5,5个十和8个一组成( ),58,3个十和2个一合起来是( ),32,100以内的整十数有(10、20、30、40、50、60、70、80、90),5,45,5,40,45,45,45,5,5,40,40,20,+,5,=,25,加法,5,+,20,=,25,40,+,2,=,42,加数,加数,和,30,4,34,加数,加数,和,30,4,34,30,4,被减数,减数,差,看谁算得快!,10+2= 30+60=50+5
2、0= 7+10=18-8= 100-80=20+70= 16-10=,12,100,10,6,90,20,17,90,1、计算80+5= 2+80= 3+50= 62-2=56-50= 20+6=96-90= 88-8=,85,82,53,60,6,26,6,80,302,想一想：,230,322,想一想：,302,230,30,4,34,4,30,34,42,-,2,=,40,被减数,减数,差,45,5,40,45,40,5,50,7,57,57,7,50,7,50,57,57,50,7,20,8,28,28,8,20,8,20,28,28,20,8,填一填,填一填,20,4,24,24,4,20,4,20,24,24,20,4,根据上图列算式并计算。,谢谢使用!,
